9分之5乘10分之3加7分之2除以5分之3
2016-11-07 12:08发布
360U100758152
5/9×3/10+2/7÷3/5
=1/6+10/21
=7/42+20/42
=9/14
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5/9×3/10+2/7÷3/5
=1/6+10/21
=7/42+20/42
=9/14
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